Insect Alert For

Soybean Aphid

Risk Level:
Affected Area:
Full page
Alert Details

Soybean aphid risks are in the Moderate category across portions of northern Iowa and southern Minnesota, with Low risks continuing from northeast Nebraska, eastern South and North Dakota, the remainder of Minnesota, central Iowa, northern Illinois, Wisconsin, lower Michigan, northern Indiana, and northern Ohio. Reports of scattered insecticide applications and increasing soybean aphid populations especially across northern Iowa and also into southern Minnesota, along with continued favorable weather, has led to an increase in the risk level in this area. Growers located in or near the Moderate risk area, especially with soybean fields in the R1-R5 growth stage, are urged to scout fields now and take appropriate action if economic thresholds of 250 aphids/plant across most of the field are met and populations appear to be increasing. The Moderate risk area is also shifted further east into southeast Minnesota and northeast Iowa by the weekend and early next week as the potential for population increases is also favorable in this region. Growers all across the upper Midwest and into the Great Lakes region should be actively scouting soybean fields that are at R5 or younger growth stages as populations, where present, may increase dramatically given favorable temperatures predicted in the next week.